#include<stdio.h>

void arr_reverse(int* arr,int length)
{
    printf("逆序排列\n");
    int i,temp;
    for(i=0;i<length/2;i++)
	{
        temp = arr[length-1-i];
        arr[length-1-i] = arr[i];
        arr[i]=temp;
    }
    printf("排列完毕\n");
}



